805321039 has 16 divisors (see below), whose sum is σ = 855208800. Its totient is φ = 757177344.

The previous prime is 805321037. The next prime is 805321043. The reversal of 805321039 is 930123508.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 805321039 - 2¹ = 805321037 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 805321039.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (805321037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 170599 + ... + 175255.

It is an arithmetic number, because the mean of its divisors is an integer number (53450550).

Almost surely, 2^805321039 is an apocalyptic number.

805321039 is a gapful number since it is divisible by the number (89) formed by its first and last digit.

805321039 is a deficient number, since it is larger than the sum of its proper divisors (49887761).

805321039 is a wasteful number, since it uses less digits than its factorization.

805321039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4842.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 805321039 is about 28378.1789232502. The cubic root of 805321039 is about 930.3713932693.

It can be divided in two parts, 8053 and 21039, that added together give a palindrome (29092).

The spelling of 805321039 in words is "eight hundred five million, three hundred twenty-one thousand, thirty-nine".